Chordata Bateson, 1885 - chordates
   Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758
     Subclass Actinopteri Cope, 1871 see [unranked] Actinopteri Cope, 1871
       Superorder Ganoidei (Agassiz)
         Order Halecomorphi Cope, 1872 see Division Halecomorphi Cope, 1872
           Family †Pachycormidae Woodward, 1895